Test verification device of low-conductivity electromagnetic flowmeter and control method

Abstract

The invention discloses a test verification device for a low-conductivity electromagnetic flowmeter. The test verification device comprises the low-conductivity electromagnetic flowmeter to be tested; a standard flow meter; the purification device is used for treating the liquid input into the purification device so as to reduce the conductivity of the liquid and is communicated with a liquid source through a first pipeline; the liquid storage tank is communicated with the purification device through a second pipeline, and the liquid outlet end of the liquid storage tank is sequentially communicated with the measured low-conductivity electromagnetic flowmeter and the standard flowmeter through a fourth pipeline; the liquid pump is used for providing power for the liquid in the liquid storage tank to flow in the pipeline and is arranged on the fourth pipeline; each pipeline is provided with a liquid valve and a measurement and control unit, the conductivity parameters of the liquid in the liquid storage tank are collected in real time, and the flow of the liquid valves and the operation states of the liquid pump and the purification device are controlled, so that the conductivity parameters of the liquid in the liquid storage tank reach a preset threshold value range; and the test verification of the tested low-conductivity electromagnetic flowmeter is completed.

Description

Technical Field

[0001] The invention belongs to the technical field of electromagnetic flowmeter testing, and in particular relates to a testing and verification device and a control method for a low-conductivity electromagnetic flowmeter. Background Art

[0002] Low conductivity electromagnetic flowmeter is a flow measurement instrument designed for measuring low conductivity fluids. It can measure fluids with conductivity as low as 2μS / cm. The flowmeter has been widely used in many industries and fields such as electronic chip manufacturing, pharmaceuticals, chemicals, environmental monitoring, food and beverages, and agricultural irrigation. However, the measurement and verification of low conductivity electromagnetic flowmeters currently face significant technical challenges. Traditional flowmeter test verification methods are difficult to meet the test requirements of low conductivity electromagnetic flowmeters. For example, conventional type evaluation tests usually use clean water with a conductivity of 150μS / cm~400μS / cm as the measuring medium, which cannot accurately verify the characteristics of low conductivity electromagnetic flowmeters. In addition, the weighing method, as a common means of verifying low conductivity electromagnetic flowmeters, is theoretically feasible, but has many limitations in practical applications. First of all, the weighing method requires high-precision weighing equipment and strict experimental condition control, while the procurement and maintenance costs of high-precision weighing equipment are high, and it is extremely sensitive to factors such as environmental vibration and temperature changes. These limitations lead to obvious defects in the testing and verification of low-conductivity electromagnetic flowmeters, making it difficult to meet the accuracy and efficiency requirements in practical applications. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a test verification device and control method for a low-conductivity electromagnetic flowmeter. This solution innovatively introduces a modular structure into the test verification device, which significantly improves the expandability and applicability of the device. Through the feedback pipeline and the control method adapted thereto, it is possible to accurately obtain and maintain the liquid conductivity parameters within the preset threshold range, quickly obtain low-conductivity liquid, and reduce the liquid acquisition cost and test cycle. At the same time, the introduction of modular design and testing methods realizes the flexibility and intelligence of the test process, and provides an efficient and reliable test verification solution for the research and development of low-conductivity electromagnetic flowmeters.

[0004] To achieve the above object, the technical solution of the present invention is: The first aspect of the present invention provides a test and verification device for a low-conductivity electromagnetic flowmeter, comprising: a low-conductivity electromagnetic flowmeter to be tested; a standard flowmeter; a purification device, used to process the liquid input into the purification device to reduce the conductivity of the liquid, and connected to a liquid source through a first pipeline; a liquid storage tank, connected to the purification device through a second pipeline, and the liquid outlet of the liquid storage tank is connected to the low-conductivity electromagnetic flowmeter to be tested and the standard flowmeter in sequence through a fourth pipeline; a liquid pump, providing power for the liquid in the liquid storage tank to flow in the pipeline, and being arranged on the fourth pipeline; the first pipeline is connected to the liquid storage tank through a third pipeline The fourth pipeline is connected with the third pipeline through a fifth pipeline, and a plurality of liquid valves are provided. The first pipeline is provided with a first valve, the second pipeline is provided with a second valve, the third pipeline is provided with a third valve and a fifth valve, and the fourth pipeline is provided with a fourth valve, a sixth valve and a seventh valve; a measurement and control unit collects the conductivity parameters of the liquid in the liquid storage tank in real time, and controls the flow rate of the liquid valve, the operating state of the liquid pump and the purification device, so as to achieve that the conductivity parameters of the liquid in the liquid storage tank reach a preset threshold range, and complete the test verification of the low-conductivity electromagnetic flowmeter under test.

[0005] Preferably, the connecting end of the fifth pipeline and the fourth pipeline is located in the pipe section between the output end of the liquid pump and the input end of the low-conductivity electromagnetic flowmeter to be measured, the fifth valve is located in the pipe section between the connecting end of the fifth pipeline and the third pipeline and the connecting end of the third pipeline and the liquid storage tank, and the third valve is located on the remaining pipe section of the third pipeline.

[0006] Preferably, the first valve is located in a pipe section between an input end of the first pipe and a connecting end of the first pipe and the third pipe.

[0007] Preferably, the output end of the fourth pipeline is connected to the liquid storage tank, the fourth valve is located in the pipe section at the input end of the liquid pump, the sixth valve is located in the pipe section between the connecting end of the fifth pipeline and the fourth pipeline and the input end of the low-conductivity electromagnetic flowmeter to be measured, and the seventh valve is located in the pipe section at the output end of the standard flowmeter.

[0008] Preferably, it also includes a sixth pipeline, which is connected to the purification device for discharging waste liquid after liquid purification, and the sixth pipeline is provided with an eighth valve. The measurement and control unit controls the flow of the eighth valve, and the purification device is provided with an activated carbon component and a reverse osmosis membrane component.

[0009] Preferably, the measurement and control unit also includes a conductivity sensor and a liquid level sensor, the liquid storage tank is connected to the conductivity sensor and the liquid level sensor respectively, the power of the liquid pump is provided with three gears: high, medium and low, the liquid source connected to the first pipeline is tap water, and the preset conductivity parameter threshold range of the liquid in the liquid storage tank is 2μS / cm-5μS / cm.

[0010] A second aspect of the present invention provides a control method for testing and verifying a low-conductivity electromagnetic flowmeter, which is applied to a test and verification device for a low-conductivity electromagnetic flowmeter as described above, and comprises sequentially performing the following steps: Based on the liquid level sensor, the liquid level of the liquid storage tank is monitored, and the liquid in the liquid storage tank is dynamically adjusted to reach a preset value; Monitoring the conductivity of the liquid in the liquid storage tank based on a conductivity sensor, and dynamically adjusting the conductivity of the liquid in the liquid storage tank to reach a preset threshold range; The liquid in the liquid storage tank is driven to flow through the low-conductivity electromagnetic flowmeter to be tested and the standard flowmeter to test the low-conductivity electromagnetic flowmeter to be tested.

[0011] Preferably, the step of dynamically adjusting the conductivity of the liquid in the liquid storage tank to reach a preset threshold range specifically includes: When the conductivity of the liquid in the liquid storage tank monitored by the conductivity sensor is lower than the lower limit of the preset threshold range, the first valve on the first pipeline connecting the purification device and the liquid source, the third valve and the fifth valve on the third pipeline connecting the input end of the purification device and the liquid storage tank are opened, and the remaining liquid valves, the liquid pump, and the purification device are closed; When the conductivity of the liquid in the liquid storage tank monitored by the conductivity sensor is higher than the upper limit value of the preset threshold range, the liquid pump, the fourth valve located at the input end of the liquid pump, the third valve near the connection end of the third pipeline and the first pipeline, the first valve, the purification device, the second valve on the second pipeline connecting the purification device and the liquid storage tank, and the eighth valve on the sixth pipeline for discharging waste liquid from the purification device are opened, and the remaining liquid valves are closed.

[0012] A third aspect of the present invention provides a test verification control device for a low-conductivity electromagnetic flowmeter, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements any step of the test verification control method based on a low-conductivity electromagnetic flowmeter.

[0013] A fourth aspect of the present invention provides a computer-readable storage medium having instructions stored thereon, and when the instructions are executed by a processor, any one of the test verification control methods based on a low-conductivity electromagnetic flowmeter is implemented.

[0014] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art: In an embodiment of the present invention, a test and verification device for a low-conductivity electromagnetic flowmeter includes a purification device and a liquid storage tank, wherein the purification device is connected to a liquid source through a first pipe, and the liquid storage tank is connected to the purification device through a second pipe. At the same time, the first pipe is connected to the liquid storage tank through a third pipe, and the fourth pipe connected to the liquid storage tank is connected to the third pipe through a fifth pipe. The liquid of the liquid source flows through the first pipe and the purification device in turn into the liquid storage tank, ensuring that a certain amount of liquid is retained in the liquid storage tank to meet the test and verification requirements of the low-conductivity electromagnetic flowmeter in different scenarios. The parameters of the conductivity of the liquid in the liquid storage tank are monitored in real time for processing: if the preset threshold range is not reached, the liquid in the liquid storage tank or the liquid source will be circulated through the feedback device composed of the fourth pipe, the fifth pipe, the third pipe and the first pipe until the parameters of the liquid conductivity meet the preset threshold range and are stored in the liquid storage tank, thereby meeting the basic test conditions. The device is simple and efficient in design, reducing the cost of obtaining low-conductivity liquid.

[0015] In an embodiment of the present invention, the fourth pipeline output end of the test and verification device of the low-conductivity electromagnetic flowmeter is connected to the liquid storage tank, which can recover and recycle the liquid flowing through the low-conductivity electromagnetic flowmeter being tested, thereby improving the utilization efficiency of the low-conductivity liquid, reducing the demand for liquid, and effectively reducing the manufacturing cost of the liquid.

[0016] In the embodiment of the present invention, the fourth pipeline sequentially connects the low-conductivity electromagnetic flowmeter to be tested and the standard flowmeter. The plug-in installation makes the installation and removal of the low-conductivity electromagnetic flowmeter simple and efficient, thereby improving the flexibility and convenience of test verification.

[0017] In the embodiment of the present invention, the liquid pump in the test and verification device of the low-conductivity electromagnetic flowmeter is configured on the fourth pipeline. The fourth pipeline is not only a part of the feedback device for obtaining the preset conductivity liquid, but also a part of the test and verification device of the low-conductivity electromagnetic flowmeter. By reusing part of the device, the overall structure is simplified, the complexity of the device is reduced, and the cost is saved.

[0018] In an embodiment of the present invention, a test verification control method for a low-conductivity electromagnetic flowmeter is combined with a test verification device, a control device, and a computer-readable storage medium to intelligently obtain test verification of liquids that meet preset conductivity requirements and low-conductivity electromagnetic flowmeters, thereby improving test efficiency and accuracy and providing a practical and reliable test verification solution for the research and development and production of low-conductivity electromagnetic flowmeters. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein: Figure 1 It is a schematic diagram of a test and verification device for a low-conductivity electromagnetic flowmeter of the present invention; Figure 2 It is a flow chart of a test verification control method of a low-conductivity electromagnetic flowmeter according to the present invention; Description of reference numerals: 1: the measured low-conductivity electromagnetic flowmeter; 2: the standard flowmeter; 3: the purification device; 4: the liquid pump; 501: the first valve; 502: the second valve; 503: the third valve; 504: the fourth valve; 505: the fifth valve; 506: the sixth valve; 507: the seventh valve; 508: the eighth valve; 509: the conductivity sensor; 510: the liquid level sensor; 6: the liquid storage tank; 701: the first pipeline; 702: the second pipeline; 703: the third pipeline; 704: the fourth pipeline; 705: the fifth pipeline; 706: the sixth pipeline. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0021] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] Embodiment 1 See also Figure 1A test and verification device for a low-conductivity electromagnetic flowmeter, comprising: a low-conductivity electromagnetic flowmeter 1 to be tested; a standard flowmeter 2; a purification device 3, used to process the liquid input into the purification device 3 to reduce the conductivity of the liquid, and connected to the liquid source through a first pipeline 701; a liquid storage tank 6, connected to the purification device 3 through a second pipeline 702, and the liquid outlet end of the liquid storage tank 6 is connected to the low-conductivity electromagnetic flowmeter 1 to be tested and the standard flowmeter 2 in sequence through a fourth pipeline 704; a liquid pump 4, providing power for the liquid in the liquid storage tank 6 to flow in the pipeline, and is arranged on the fourth pipeline 704; the first pipeline 701 is connected to the liquid storage tank 6 through a third pipeline 703, and the fourth pipeline 704 is connected to the liquid storage tank 6 through a fourth pipeline 704. It is connected to the third pipeline 703 through the fifth pipeline 705, and has several liquid valves. The first pipeline 701 is provided with a first valve 501, the second pipeline 702 is provided with a second valve 502, the third pipeline 703 is provided with a third valve 503 and a fifth valve 505, and the fourth pipeline 704 is provided with a fourth valve 504, a sixth valve 506, and a seventh valve 507; the measurement and control unit collects the conductivity parameters of the liquid in the liquid storage tank 6 in real time, and controls the flow rate of the above-mentioned liquid valves, the operating status of the liquid pump 4 and the purification device 3, so as to achieve that the conductivity parameters of the liquid in the liquid storage tank 6 reach the preset threshold range, and complete the test verification of the low-conductivity electromagnetic flowmeter 1 under test.

[0023] When the device controls the liquid level of the liquid storage tank 6, the measurement and control unit monitors whether the liquid level of the liquid storage tank 6 reaches a preset value parameter. If so, the first valve 501 is controlled to be closed to stop the new liquid from entering the liquid storage tank 6. Otherwise, the first valve 501 is opened to drive the liquid source to flow through the first pipeline 701 into the purification device 3. The purification device 3 performs conductivity reduction treatment on the input liquid, and the treated liquid is output from the purification device 3 through the second pipeline 702 and flows into the liquid storage tank 6.

[0024] The device dynamically adjusts the conductivity of the liquid in the liquid storage tank 6, and the measurement and control unit monitors the conductivity parameters of the liquid in the liquid storage tank 6. If the preset threshold range is not reached, the measurement and control unit dynamically controls the liquid valve, liquid pump 4, and purification device 3 on the pipeline to finally achieve the conductivity standard. Case 1: If the conductivity parameter of the liquid in the liquid storage tank 6 monitored by the measurement and control unit is higher than the upper limit value of the preset threshold range, the measurement and control unit drives the liquid pump 4 and the purification device 3 to open the first valve 501, the second valve 502, the third valve 503, and the fourth valve 504 to realize that the liquid in the liquid storage tank 6 flows through the fourth pipeline 704 and the third pipeline 703 to the purification device 3 in sequence to reduce the conductivity of the liquid, and the treated liquid flows from the purification device 3 through the second pipeline 702 back to the liquid storage tank 6 to realize the overall reduction of the conductivity of the liquid in the liquid storage tank 6 to realize the liquid conductivity of the liquid in the liquid storage tank 6 until it reaches the preset threshold range. Case 2: If the conductivity parameter of the liquid in the liquid storage tank 6 monitored by the measurement and control unit is lower than the lower limit of the preset threshold range, the measurement and control unit opens the first valve 501, the third valve 503, and the fifth valve 505 to allow the liquid source to flow through the first pipeline 701 and the third pipeline 703 in sequence into the liquid storage tank 6, and the liquid conductivity of the liquid storage tank 6 is increased by the incremental liquid source to achieve the liquid conductivity parameter of the liquid storage tank 6 until it reaches the preset threshold range.

[0025] The device performs a test and verification on the low-conductivity electromagnetic flowmeter 1 under test, and the measurement and control unit drives the liquid pump 4 to make the liquid in the liquid storage tank 6 flow through the low-conductivity electromagnetic flowmeter 1 under test and the standard flowmeter 2 to realize counting of both.

[0026] Continue to see Figure 1 Preferably, the connecting end of the fifth pipeline 705 and the fourth pipeline 704 is located in the pipe section between the output end of the liquid pump 4 and the input end of the low-conductivity electromagnetic flowmeter 1 to be measured, the fifth valve 505 is located in the pipe section between the connecting end of the fifth pipeline 705 and the third pipeline 703 and the connecting end of the third pipeline 703 and the liquid storage tank 6, and the third valve 503 is located on the remaining pipe section of the third pipeline 703.

[0027] The measurement and control unit controls the third valve to open and the fifth valve to open so that the liquid in the first pipeline 701 can flow directly from the third pipeline 703 into the liquid storage tank 6 to improve the conductivity of the liquid in the liquid storage tank 6. The measurement and control unit controls the fourth valve 504 to open, the third valve 503 to open, and the liquid pump 4 to open so that the liquid in the liquid storage tank 6 is circulated and sent to the purification device 3 in order to reduce the conductivity of the liquid in the liquid storage tank 6. By setting two valves at different positions of the third pipeline 703, the conductivity of the liquid storage tank 6 can be dynamically adjusted, which reduces the complexity of the device and reduces the cost.

[0028] Continue to see Figure 1 Preferably, the first valve 501 is located in a pipe section between the input end of the first pipeline 701 and the connecting end of the first pipeline 701 and the third pipeline 703 .

[0029] Continue to see Figure 1 Preferably, the output end of the fourth pipeline 704 is connected to the liquid storage tank 6, the fourth valve 504 is located in the pipe section at the input end of the liquid pump 4, the sixth valve 506 is located in the pipe section between the connection end of the fifth pipeline 705 and the fourth pipeline 704 and the input end of the low-conductivity electromagnetic flowmeter 1 to be measured, and the seventh valve 507 is located in the pipe section at the output end of the standard flowmeter 2. By connecting the output end of the fourth pipeline 704 to the liquid storage tank, the tested and verified liquid can be recycled, reducing the demand for low-conductivity liquid. The fourth valve 504 is used to control the liquid flow rate of the liquid storage tank, the sixth valve controls the flow rate of the low-conductivity electromagnetic flowmeter 1 to be measured, and the seventh valve 507 is used to control the flow rate at the output end of the fourth pipeline 704.

[0030] Continue to see Figure 1 Preferably, it also includes a sixth pipeline 706, which is connected to the purification device 3 for discharging the waste liquid after the liquid is purified. The sixth pipeline 706 is provided with an eighth valve 508, and the measurement and control unit controls the flow of the eighth valve 508. The purification device 3 is provided with an activated carbon component and a reverse osmosis membrane component. When the purification device 3 is working, the liquid at the input end of the purification device 3 is treated by the activated carbon component to remove organic matter and odor impurities in the liquid, and the impurities are further intercepted by the reverse osmosis membrane component. The purified liquid flows through the second pipeline 702 into the liquid storage tank 6, and the waste liquid in the treatment process is discharged from the sixth pipeline 706. The measurement and control unit controls the flow of the eighth valve 508 to realize the normal operation of the discharge function of the purification device.

[0031] Continue to see Figure 1 Preferably, the measurement and control unit also includes a conductivity sensor 509 and a liquid level sensor 510. The liquid storage tank 6 is connected to the conductivity sensor 509 and the liquid level sensor 510 respectively. The power of the liquid pump 4 is provided with three gears: high, medium and low. The liquid source connected to the first pipe 701 is tap water. The preset conductivity parameter threshold range of the liquid in the liquid storage tank 6 is 2μS / cm-5μS / cm. The liquid source is tap water, which has the advantages of being quick and easy to obtain. The liquid pump 4 is equipped with three gears, and the liquid flow rate can be adjusted according to the test scenario, so as to realize a variety of test scenarios in which different flow rates enter the measured low-conductivity electromagnetic flowmeter 1.

[0032] Embodiment 2 For ease of understanding, the specific process of the embodiment of the present invention is described below. Figure 2 A control method for testing and verifying a low-conductivity electromagnetic flowmeter is applied to a testing and verification device for a low-conductivity electromagnetic flowmeter, comprising the following steps: S100: Based on the liquid level sensor 510 monitoring the liquid level of the liquid storage tank 6, dynamically adjusting the liquid in the liquid storage tank 6 to reach a preset value; S200: Based on the conductivity sensor 509 monitoring the conductivity of the liquid in the liquid storage tank 6, dynamically adjusting the conductivity of the liquid in the liquid storage tank 6 to a parameter within a preset threshold range; S300: driving the liquid in the liquid storage tank 6 to flow through the low-conductivity electromagnetic flowmeter 1 to be tested and the standard flowmeter 2 to test the low-conductivity electromagnetic flowmeter 1 to be tested.

[0033] In conjunction with the test verification device of the low-conductivity electromagnetic flowmeter of the first embodiment, the following is described: S100: The measurement and control unit monitors whether the liquid level of the liquid storage tank 6 reaches the preset value parameter. If so, the first valve 501 is controlled to be closed to stop the new liquid from entering the liquid storage tank 6. Otherwise, the first valve 501 is opened to drive the liquid source to flow through the first pipeline 701 into the purification device 3. The purification device 3 performs conductivity reduction treatment on the input liquid, and the treated liquid is output from the purification device 3 through the second pipeline 702 and flows into the liquid storage tank 6.

[0034] S300: The measurement and control unit drives the liquid pump 4 to make the liquid in the liquid storage tank 6 flow through the low-conductivity electromagnetic flowmeter 1 to be measured and the standard flowmeter 2 on the fourth pipeline 704 to achieve counting of both. The measurement and control unit can control the power gear of the liquid pump 4 to adjust the flow rate entering the low-conductivity electromagnetic flowmeter 1 to be measured and the standard flowmeter 2 to achieve different flow rates entering the test scenario of the low-conductivity electromagnetic flowmeter 1 to be measured.

[0035] Preferably, the step of dynamically adjusting the conductivity parameter of the liquid in the liquid storage tank 6 to reach a preset threshold range specifically includes: When the conductivity parameter of the liquid in the liquid storage tank 6 monitored by the conductivity sensor 509 is lower than the lower limit of the preset threshold range, the first valve 501 on the first pipeline 701 connecting the purification device 3 and the liquid source, the third valve 503 and the fifth valve 505 on the third pipeline 703 connecting the input end of the purification device 3 and the liquid storage tank 6 are opened, and the remaining liquid valves, the liquid pump 4, and the purification device 3 are closed; When the conductivity parameter of the liquid in the liquid storage tank 6 monitored by the conductivity sensor 509 is higher than the upper limit value of the preset threshold range, the liquid pump 4, the fourth valve 504 located at the input end of the liquid pump 4, the third valve 503 near the connection end of the third pipeline 703 and the first pipeline 701, the first valve 501, the purification device 3, the second valve 502 on the second pipeline 702 connecting the purification device 3 and the liquid storage tank 6, and the eighth valve 508 on the sixth pipeline 706 for discharging waste liquid from the purification device 3 are opened, and the remaining liquid valves are closed.

[0036] Embodiment 3 A third aspect of the present invention provides a test verification control device for a low-conductivity electromagnetic flowmeter, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, any step of a test verification control method based on a low-conductivity electromagnetic flowmeter is implemented.

[0037] Embodiment 4 A fourth aspect of the present invention provides a computer-readable storage medium having instructions stored thereon, and when the instructions are executed by a processor, any one of the test verification control methods based on a low-conductivity electromagnetic flowmeter is implemented.

[0038] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] Those skilled in the art can clearly understand that, for the sake of convenience and brevity in description, the identification content specifically executed by the above-described system and device can refer to the corresponding process in the aforementioned method embodiment.

[0041] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A test and verification device for a low-conductivity electromagnetic flowmeter, characterized in that: include: The low-conductivity electromagnetic flowmeter being measured; Standard flow meter; A purification device, used for treating the liquid input into the purification device to reduce the conductivity of the liquid, and connected to the liquid source through a first pipeline; A liquid storage tank is connected to the purification device through a second pipeline, and a liquid outlet of the liquid storage tank is connected to the low-conductivity electromagnetic flowmeter and the standard flowmeter in sequence through a fourth pipeline; A liquid pump, providing power for the liquid in the liquid storage tank to flow in the pipeline, and is arranged on the fourth pipeline; The first pipeline is connected to the liquid storage tank through a third pipeline, the fourth pipeline is connected to the third pipeline through a fifth pipeline, and a plurality of liquid valves are provided. The first pipeline is provided with a first valve, the second pipeline is provided with a second valve, the third pipeline is provided with a third valve and a fifth valve, and the fourth pipeline is provided with a fourth valve, a sixth valve, and a seventh valve; The measurement and control unit collects the conductivity parameters of the liquid in the liquid storage tank in real time, and controls the flow of the liquid valve, the operating status of the liquid pump and the purification device, so as to achieve that the conductivity parameters of the liquid in the liquid storage tank reach a preset threshold range, thereby completing the test verification of the low-conductivity electromagnetic flowmeter being tested.

2. The low-conductivity electromagnetic flowmeter test verification device according to claim 1, characterized in that: The connecting end of the fifth pipeline and the fourth pipeline is located in the pipe section between the output end of the liquid pump and the input end of the low-conductivity electromagnetic flowmeter to be measured, the fifth valve is located in the pipe section between the connecting end of the fifth pipeline and the third pipeline and the connecting end of the third pipeline and the liquid storage tank, and the third valve is located on the remaining pipe section of the third pipeline.

3. The low-conductivity electromagnetic flowmeter test verification device according to claim 1, characterized in that: The first valve is located in a pipe section between an input end of the first pipe and a connecting end of the first pipe and the third pipe.

4. The low-conductivity electromagnetic flowmeter test verification device according to claim 2, characterized in that: The output end of the fourth pipeline is connected to the liquid storage tank, the fourth valve is located in the pipe section at the input end of the liquid pump, the sixth valve is located in the pipe section between the connecting end of the fifth pipeline and the fourth pipeline and the input end of the low-conductivity electromagnetic flowmeter to be measured, and the seventh valve is located in the pipe section at the output end of the standard flowmeter.

5. The low-conductivity electromagnetic flowmeter test verification device according to claim 1, characterized in that: It also includes a sixth pipeline, which is connected to the purification device for discharging waste liquid after liquid purification. The sixth pipeline is provided with an eighth valve. The measurement and control unit controls the flow of the eighth valve. The purification device is provided with an activated carbon component and a reverse osmosis membrane component.

6. The test and verification device for a low-conductivity electromagnetic flowmeter according to claim 1, characterized in that: The measurement and control unit also includes a conductivity sensor and a liquid level sensor. The liquid storage tank is connected to the conductivity sensor and the liquid level sensor respectively. The power of the liquid pump is provided with three gears: high, medium and low. The liquid source connected to the first pipeline is tap water. The preset conductivity parameter threshold range of the liquid in the liquid storage tank is 2μS / cm-5μS / cm.

7. A control method for testing and verifying a low-conductivity electromagnetic flowmeter, applied to the testing and verifying device for a low-conductivity electromagnetic flowmeter according to any one of claims 1 to 6, characterized in that: The process includes performing the following steps in sequence: Based on the liquid level sensor, the liquid level of the liquid storage tank is monitored, and the liquid in the liquid storage tank is dynamically adjusted to reach a preset value; Based on the conductivity sensor, the conductivity of the liquid in the liquid storage tank is monitored, and the conductivity parameter of the liquid in the liquid storage tank is dynamically adjusted to reach a preset threshold range; The liquid in the liquid storage tank is driven to flow through the low-conductivity electromagnetic flowmeter to be tested and the standard flowmeter to test the low-conductivity electromagnetic flowmeter to be tested.

8. The control method for testing and verifying a low-conductivity electromagnetic flowmeter according to claim 7, characterized in that: The step of dynamically adjusting the conductivity parameter of the liquid in the liquid storage tank to reach a preset threshold range specifically includes: When the conductivity parameter of the liquid in the liquid storage tank monitored by the conductivity sensor is lower than the lower limit of the preset threshold range, the first valve on the first pipeline connecting the purification device and the liquid source, the third valve and the fifth valve on the third pipeline connecting the input end of the purification device and the liquid storage tank are opened, and the remaining liquid valves, the liquid pump, and the purification device are closed; When the conductivity parameter of the liquid in the liquid storage tank monitored by the conductivity sensor is higher than the upper limit value of the preset threshold range, the liquid pump, the fourth valve located at the input end of the liquid pump, the third valve near the connection end of the third pipeline and the first pipeline, the first valve, the purification device, the second valve on the second pipeline connecting the purification device and the liquid storage tank, and the eighth valve on the sixth pipeline for discharging waste liquid from the purification device are opened, and the remaining liquid valves are closed.

9. A test verification control device for a low-conductivity electromagnetic flowmeter, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the computer program is executed by the processor, the steps of the test verification control method based on the low-conductivity electromagnetic flowmeter as described in any one of claims 7 to 8 are implemented.

10. A computer-readable storage medium having instructions stored thereon, characterized in that: When the instructions are executed by the processor, a test verification control method based on a low-conductivity electromagnetic flowmeter as described in any one of claims 7 to 8 is implemented.

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